(a)

The logistic function .

Graph:

Graph  the logistic function .

(b)

Find .

.

(c)

.

The limit resembles that as the number of years increses since , the world record heights for women remains .

(a)

Graph of  the logistic function is \ \

(b) .

(c) \ \

The limit resembles that as the number of years increses since , the world record heights for women remains .